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-rw-r--r--src/pkg/runtime/extern.go11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/pkg/runtime/extern.go b/src/pkg/runtime/extern.go
index 131767aef..70c6f434b 100644
--- a/src/pkg/runtime/extern.go
+++ b/src/pkg/runtime/extern.go
@@ -46,3 +46,14 @@ func GOMAXPROCS(n int)
// Cgocalls returns the number of cgo calls made by the current process.
func Cgocalls() int64
+
+// Semacquire waits until *s > 0 and then atomically decrements it.
+// It is intended as a simple sleep primitive for use by the synchronization
+// library and should not be used directly.
+func Semacquire(s *uint32)
+
+// Semrelease atomically increments *s and notifies a waiting goroutine
+// if one is blocked in Semacquire.
+// It is intended as a simple wakeup primitive for use by the synchronization
+// library and should not be used directly.
+func Semrelease(s *uint32)